class Students:
    def __init__(self, name, xuehao, phone):
        self.name = name
        self.xuehao = xuehao
        self.phone = phone
        
    def print_phone(self):
        print("{name}的电话是{phone}".format(name=self.name,phone=self.phone))
        
    def say_hello(self):
        print("你好，我是{name}".format(name=self.name))